Re: 2.5 'what to expect'

Andreas Dilger (
Sun, 13 Jul 2003 08:51:18 -0700

On Jul 12, 2003 20:46 +0100, Jamie Lokier wrote:
> Jeff Garzik wrote:
> > Jamie Lokier wrote:
> > >2.4 fails on write()? A strace of "rpm --rebuilddb" shows it is
> > >opening with O_DIRECT and writing just fine. Or does that only work
> > >with RedHat's 2.4 kernels?
> >
> > Are you testing on a filesystem where an O_DIRECT is not supported?
> > The "it works" case is not an issue.
> ext3.

ext3 in 2.4 kernels does not support O_DIRECT. To confuse matters,
recent RH kernels silently ignore O_DIRECT if you are not root, so
you may think O_DIRECT is being used, but it isn't.

Cheers, Andreas

Andreas Dilger

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